Firearm Kits Gun Parts
(280 deals total)
- Firearm Kits
from $379.99
UPC:
000516444601
MPN:
516444601
Caliber:
223/5.56
Type:
Rifle Kit
Overall Length:
24.5"
from $319.99
UPC:
745557100741
MPN:
RK9MM16LPK
Caliber:
9mm
Type:
Build Kit
Overall Length:
17.8000
from $299.99
UPC:
745557101038
MPN:
PK556-LPK
Overall Length:
14.2500
from $314.94
from $499.99
UPC:
005165447638
MPN:
5165447638
Caliber:
223/5.56
Type:
PSA Custom Firearm
Overall Length:
24.5"
10 months ago
,
by Dealer
VZ 61 Skorpion parts kit, includes all components, except receiver and barrel.
Unlock the potential of historical firearms with our VZ-61 Parts Kit. The VZ-61 is a compact and legendary submachine gun that gained fame in the 1960s. Whether you're a collector, enthusiast, or hobbyist, this parts kit will ignite your passion for vintage weaponry.
Key Features:
1. Authentic Components: Our VZ-61 Parts Kit contains a selection of authentic, original components from the VZ-61 Skorpion, , bolt, and various small parts.
- MPN: FM-VZ61-01
9 months ago
Description
16″ .223/5.56 Premium Holiday Build Kit includes:
- AR-15 BILLET UPPER RECEIVER
- AR-15 BLACK DUST COVER
- BLACK NITRIDE .223/5.56/.300/.350 Bolt Carrier Group
- AR-15 Black Ambi Charging Handle
- AR-15 Lower Parts Kit
- .750 Gas Block
- Carbine Gas Tube
- LE Mil-Spec Stock Kit
- 10″ – 12″ Keymod Handguard
- 1/2 x28 Competition Muzzle Brake
- 16″ .223/5.56 Barrel
Legal Restriction:
- MPN: KIT-15-223-16-014
9 months ago
7″ | .45 ACP | Build Kit
Features:
- A2 Birdcage flash hider (5/8×24)
- AR-15 Charging Handle
- AR-15 Lower Parts Kit
- Mis-Spec Pistol Tube Kit w/9MM Buffer
- .45 ACP BCG
- 7″ Handguard depending on availability
- 7.5″ .45 ACP Barrel
- 9mm/.45 Upper Receiver
Legal Restriction:
- MPN: KIT-15-045-07-001
9 months ago
16″ | .45 ACP | Build Kit
Features:
- A2 Birdcage flash hider (5/8×24)
- AR-15 Charging Handle
- AR-15 Lower Parts Kit
- LE mil-spec spec stock kit w/ 9mm Buffer
- .45 ACP BCG
- 12″ – 15″ Handguard depending on availability
- 16″ .45 ACP Blowback Barrel
- 9mm/.45 Upper Receiver
Legal Restriction:
- MPN: KIT-15-045-16-001
8 months ago
Disclosure: Handguards will be either keymod, mlok or quad rail depending on availability. This build kit will come with everything EXCEPT the stripped lower receiver to build a 10.5″ AR-15.
This kit includes:
- 10.5″ 5.56/.223 Barrel (black nitride or stainless steel, twist may vary)
- 7″-10″ Free-Float Handguard (depending on availability)
- Thread Protector
- Pistol Buffer Kit
- Full Auto Nitride MPI BCG
- Either Stripped or Upgraded Billet Upper Receiver (depending on availability)
- Forward Assist (where applicable)
- Dust Cover
- Steel Gas Block
Durkin Tactical
436
8 months ago
Description
This kit will include everything to finish your AR-15 pistol except the STRIPPED lower receiver
- Either mil spec upper receiver or upgraded billet upper receiver (depending on availability) FDE cerakote
- Nitride bcg
- Standard charging handle
- 12″ free float quad rail FDE
- Forward assist and dust cover include (where applicable)
- 16″- 300 Blackout
- 4150 chromoly vanadium or 416 R stainless barrel depending on customer choice and availability
- Steel gas block
- Stainless steel gas tube
- MPN: KIT-15-300-16-002
8 months ago
Disclosure: Handguards will be either keymod or mlok depending on availability. This build kit will come with everything EXCEPT the stripped lower receiver to build a 16″ AR-15.
This kit includes:
- 16″ 5.56/.223 Barrel (twist may vary)
- 12″ Free Float Handguard (depending on availability)
- Compensator Flash Hider
- Complete Omega Stock Kit
- Nitride BCG
- Either Stripped or Upgraded Billet Upper Receiver (depending on availability)
- Forward Assist (where applicable)
- Dust Cover
- Steel Gas Block
- Stainless Gas Tube
- Standard Charging Handle
Durkin Tactical
150
8 months ago
Description
Disclosure: Handguards will be either keymod or mlok depending on availability. This build kit will come with everything EXCEPT the stripped lower receiver to build a 10.5″ AR-15.
This kit includes:
- 10.5″ 5.56/.223 Barrel (twist may vary)
- 10″ Free-Float Handguard (depending on availability)
- A2 Flash Hider
- Pistol Buffer Kit
- Full Auto Nitride BCG
- Either Stripped or Upgraded Billet Upper Receiver (depending on availability)
- Forward Assist (where applicable)
- Dust Cover
- Steel Gas Block
- Stainless Gas Tube
Durkin Tactical
105
8 months ago
Description
Disclosure: Handguards will be either keymod or mlok depending on availability. This build kit will come with everything EXCEPT the stripped lower receiver to build a 7.5″ AR-15.
This kit includes:
- 7.5″ Chromoly Vanadium 5.56/.223 Barrel (twist may vary)
- 7″ Free-Float Handguard (depending on availability)
- A2 Flash Hider
- Pistol Buffer Kit
- Full Auto Nitride BCG
- Either Stripped or Upgraded Billet Upper Receiver (depending on availability)
- Forward Assist (where applicable)
- Dust Cover
- Steel Gas Block
- Stainless Gas Tube
Durkin Tactical
156
7 months ago
Details
- Stripped lower receiver with optional Cam-Lock (more info here)
- Stripped upper receiver
- 15 inch hand guard with M-LOK mounting system
- Trigger guard
- M-905 Talon Muzzle Brake
MPN#: BDK-101-BK-02
UPC#: 810047650164
- UPC: 810047650164
- MPN: BDK-101-BK-02
7 months ago
PSA AR-15 Lower
BLEM PSA AR-15 Lower Safe/Fire - $39.99
1728B
PSA Rifle Kit
BLEM PSA Freedom AR-15 Rifle Kit 5.56 16" M4 Carbine-Lgth 1:7 Nitride - $299.99
507617B
7 months ago
The TacFire AR-15 .223/5.56 Unassembled Pistol Kit with Lower Parts Kit is a must-have for your next custom AR pistol build. Complete with everything you need to get started, this kit delivers reliable performance in a versatile, easy-to-assemble package. The kit includes a streamlined upper receiver, bolt carrier group (BCG), pistol-length gas system with low-profile gas block, M-LOK free-floating handguard, and a heat-treated steel barrel with a 1/2x28 flash hider. A Mil-Spec pistol buffer tube assembly with heavyweight buffer ensures smooth cycling in a compact setup.
- UPC: 745557101038
- MPN: PK556-LPK
6 months ago
,
by Dealer
Description
16″ 5.56/.223 Black Friday | AR-15 | Rifle Build KitThis kit includes:16″ 5.56/.223 Barrel (twist may vary)
10″-15″ Free-Float Handguard (depending on availability)
Thread Protector
Adjustable Stock Kit
Full Auto Nitride MPI BCG
Either forged or Upgraded Billet Upper Receiver
Steel Gas Block
Stainless Gas Tube
Standard Charging Handle
Complete Lower Parts Kit
All Build Kits Come Unassembled.
- MPN: KIT-15-223-16-001
4 months ago
The TacFire AR-10 .308 / 7.62x51 Unassembled Rifle Kit w/ Lower Parts Kit without Forward Assist includes a .308 / 7.62x51 bolt carrier group (BCG), charging handle, stripped upper receiver and port door, complete lower parts kit with fire control unit and pistol grip, gas tube and gas block, barrel with 1:10 twist and 5/8x24 threads, standard bird cage muzzle brake with crush washer, M-LOK® handguard, buffer kit (buffer spring, buffer weight, buffer tube, castle nut, and end plate), and adjustable butt stock. Product comes unassembled. Does NOT include lower receiver or forward assist.
- UPC: 729205627385
- MPN: RK308NFA-18
3 months ago
SKU 507617
Brand Palmetto State Armory
UPC 507617
DETAILS
Barrel Length: 16"
Gas System: Carbine Length
Barrel Profile: M4
Barrel Steel: 4150 Chrome-Moly Vanadium
Barrel Finish: Nitride
Chrome Lining: None
Muzzle Thread: 1/2-28
Chamber: 5.56 NATO
Twist Rate: 1:7
Barrel Extension: M4
Diameter at Gas Block: .750
Gas Block Type: F Marked Front Sight Base
Muzzle Device: A2 Flash Hider
Receiver Material: Forged 7075 T6
Receiver Type: M4
Handguard Type: PSA Classic Carbine Handguards, Black
Stock Type: PSA Classic M4 Adjustable Stock, Black
- MPN: 507617
3 months ago
,
by Dealer
- OVERVIEW -
This Shooters Gate AR-15 Build Kit provides a solid Mil-Spec foundation for a
dependable 5.56 NATO build.
It includes a Stripped upper receiver, a 10.5" 5.56 NATO barrel with a gas system
(twist varies depending on the barrel), and a Black 10" free-float M-LOK handguard
for stability and accessory mounting.
The kit also features a Bolt Carrier Group made in the USA, a standard charging
handle, a complete lower parts kit, and a Pistol buffer tube assembly.
Shooters Gate
996
2 months ago
,
by Dealer
Specifications:
Caliber:
9MM (Semi-Automatic)
Upper Receiver:
Stripped Upper Receiver
Charging Handle
Barrel:
16" Nitride
Blow Back Gas System
Roll Pin
1/2x36 TPI Thread
1:10 Twist Rate
Lower:
Lower Parts Kit
***Lower Receiver Sold Separately
Muzzle Device:
A2 Flash Hider
Stock Kit:
Achilles Stock Kit
Coil Spring
3.0" Buffer
Handguard:
15" Aluminum
MLOK Style
Barrel Nut with Rail Attachment and Screws
Material:
7075 T6 Aluminum
Color:
Black - Cerakote
- MPN: ZZ54011
2 months ago
,
by Dealer
Our AR-15 Build Kits are designed to make building simple, reliable, and stress-free. Each kit is built on a proven Mil-Spec foundation with compatible, builder-ready components to ensure smooth assembly and dependable performance. No guessing, no part hunting — just add a stripped lower receiver and a magazine to complete your build and get exactly the rifle you want.
AR-15 .223 Wylde 10.5″ Pistol Build Kit (Unassembled) – Black — $372.79 (Save $93.20)
Shooters Gate
249
1 month ago
This full build kit is chambered in 9mm and built around a 4.5-inch 4150 CrMoV barrel with a medium profile, nitride finish, 1-10 twist rate, and 1-2x36 threaded muzzle. The stripped AR-15 upper receiver is machined from 7075 T6 aluminum with an anodized finish and M4 feed ramps. The 9mm nitride BCG is constructed from 8620 alloy steel with a nitride finish, paired with an AR-15 M4 mil-spec charging handle. The 4-inch Honeycomb M-Lok freefloat handguard is constructed from 6061-T6 aluminum in grey.
- MPN: PI-PK-9MM-64325-SBA5
1 month ago
The Stardust 300 Full Build Kit from Davidson Defense is a .300 Blackout AR-15 pistol configuration built around an 8.5-inch heavy-profile barrel with a pistol-length gas system. The kit includes the upper assembly, a bolt carrier group, charging handle, Magpul BTR pistol brace, lower parts kit, and buffer system components. The lower receiver is not included.
Key Features
.300 Blackout chambering with 8.5-inch heavy-profile pistol-gas barrel
4150 Chrome Moly Vanadium barrel with Parkerized finish and 1-in-8 twist rate
5-in-8x24 thread pitch with muzzle-mounted fake can
- MPN: PI-PK-300-64267-BTR
1 month ago
Quick Overview
Free Shipping applies to this item only and not the entire order.
WARNING: This product can expose you to the chemical lead, which is known to the State of California to cause cancer and reproductive harm. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).
SKU: 5165458074
UPC: 5165458074
MFR#: 5165458074
Gas System: Pistol Length
Barrel Profile: Heavy
Barrel Steel: 4150V Chrome Moly Vanadium
Barrel Finish: Nitride
Chrome Lining: None
Muzzle Thread: 5/8-24
Chamber: 300 AAC Blackout
Twist Rate: 1 in 8"
- MPN: 5165458074
1 month ago
This complete caliber X-CHANGE kit allows you to convert your manual safety 9mm P320 to the civilian version of the U.S Marine Corps' M18, featuring the ability to mount the ROMEO-M17 reflex sight.
– (3) 10-round magazines.
– Full-size 3.9" Coyote-tan PVD coated stainless steel slide.
– SIG-LOC MHS footprint capable of accepting the ROMEO-M17 Red Dot Optics. (optic not included)
– Equipped with a SIGLITE front night sight and a removable Night Sight rear plate.
– Coyote-tan carry-length grip module.
– 3.9" Barrel and recoil spring assembly.
- UPC: 798681723966
- MPN: CALXM17CSSMS10
1 month ago
,
by Dealer
Overview
This Shooters Gate AR-15 Build Kit provides a solid Mil-Spec foundation for a dependable
300 Blackout build.
It includes a stripped upper receiver, a 7.5” 300 Blackout barrel with gas system
(twist varies depending on the barrel), and a black 7” free-float M-LOK handguard
for stability and accessory mounting.
The kit also features a Bolt Carrier Group made in the USA, standard charging handle,
complete lower parts kit, and a pistol buffer tube assembly.
Shooters Gate
166
1 month ago
,
by Dealer
Overview
This Shooters Gate AR-15 Build Kit provides a solid Mil-Spec foundation for a dependable 5.56 NATO build.
It includes a stripped upper receiver, a 16“ 5.56 NATO barrel with a gas system (twist varies depending on the barrel), and a Black 15“ free-float M-LOK handguard for stability and accessory mounting.
The kit also features a Bolt Carrier Group, made in the USA, standard charging handle, complete lower parts kit, and a Mil-Spec buffer tube assembly.
Shooters Gate
106
1 month ago
Tacfire PK556-LPK-7: Are you ready for your next AR-15 pistol build? Look no further than this Tacfire 7.5" pistol kit. Everything you need to build out your 5.56 pistol the only thing you need is a lower receiver and you're all set.
INCLUDES
• 7.5" Barrel
• Low profile gas block
• Pistol length gas tube
• A2 flash hider
• Bolt carrier group
• M-Lok hand guard
• Lower parts kit
• Upper parts kit
• Pistol buffer tube
• Buffer and spring
• DOES NOT INCLUDE A LOWER RECEIVER.
SPECIFICATIONS
– Cartridge 5.56x45mm NATO
– Color Anodized Black
– Material Aluminum
- UPC: 745557101038
- MPN: PK556-LPK
1 month ago
SKU 516444601
Brand Palmetto State Armory
Model Number 516444601
UPC 516444601
DETAILS
Barrel Length: 16"
Gas System: Mid-length
Barrel Profile: A2-style
Barrel Steel: Chrome-Moly Vanadium
Barrel Finish: Melonite
Chrome Lining: None
Muzzle Thread: 1/2-28
Chamber: 5.56 NATO
Twist Rate: 1:7
Barrel Extension: M4
Diameter at Gas Block: .750
Gas Block Type: F-marked Front Sight Base
Muzzle Device: A2 Flash Hider
Receiver Material: Forged 7075 T6
Receiver Type: M4
Handguard Type: Magpul MOE ODG Hand Guards
Bolt Carrier Group Included: Yes
Bolt Steel: Carpenter 158
- UPC: 000516444601
- MPN: 516444601
1 month ago
,
by Dealer
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AR-15 .223 Wylde 7.5" Pistol Build Kit (Unassembled) - Orange
Key Features
Forged Upper Receiver: Mil-Spec stripped upper receiver for durability and reliability.
7.5" .223 Wylde Barrel: Compact barrel optimized for pistol-length builds.
Orange M-LOK Handguard: 7" free-float handguard for improved stability and accessory mounting.
USA-Made BCG: Bolt carrier group manufactured in the USA.
1 month ago
,
by Dealer
- OVERVIEW -
This Shooters Gate AR-15 Build Kit provides a solid Mil-Spec foundation for a
dependable 300 Blackout build.
It includes a Stripped upper receiver, a 16” 300 Blackout barrel with a gas system
(twist varies depending on the barrel), and a Black 15” free-float M-LOK handguard
for stability and accessory mounting.
The kit also features a Bolt Carrier Group made in the USA, a standard charging
handle, a complete lower parts kit, and a Mil-Spec buffer tube assembly.
Shooters Gate
145
1 month ago
,
by Dealer
- OVERVIEW -
This Shooters Gate AR-15 Build Kit provides a solid Mil-Spec foundation for a
dependable 300 Blackout build.
It includes a Stripped upper receiver, a 7.5” 300 Blackout barrel with a gas system
(twist varies depending on the barrel), and a Black 7” free-float M-LOK handguard
for stability and accessory mounting.
The kit also features a Bolt Carrier Group made in the USA, a standard charging
handle, a complete lower parts kit, and a Pistol buffer tube assembly.
Shooters Gate
119
1 month ago
Item Number: 160873
The Tacfire Rifle Build Kit has everything you need to get your rifle build underway. They only other component you need to complete your build is the lower. All parts kits are included.
- UPC: 745557100741
- MPN: RK9MM-16-LPK
3 weeks ago
,
by Dealer
- OVERVIEW -
This Shooters Gate AR-15 Build Kit provides a solid Mil-Spec foundation for a
dependable 300 Blackout build.
It includes a Stripped upper receiver, a 10.5" 300 Blackout barrel with a gas system
(twist varies depending on the barrel), and a Black 10" free-float M-LOK handguard
for stability and accessory mounting.
The kit also features a Bolt Carrier Group made in the USA, a standard charging
handle, a complete lower parts kit, and a Pistol buffer tube assembly.
Shooters Gate
255
3 weeks ago
SKU 507617B
Brand Palmetto State Armory
Model Number 507617B
UPC 507617B
DETAILS
16" Barrel length
M4 Profile Barrel
Chrome Moly barrel
5.56 Nato Chamber
1 in 7" twist rate
F-Marked Front sight post
A2 Flash Hider
Sling Loop
Standard Hand Guards w/ heat shields
Forged upper receiver
T-Marks
Bolt Carrier Group
Charging Handle
PSA Freedom Lower build kit
** These uppers will have cosmetic blemishes that do not affect function. This may include, but is not limited to, forging marks under the finish, scratches, slight variation in the finish color coat.
FEATURES
- MPN: 507617B
2 weeks ago
,
by Dealer
Key Features
Forged 7075-T6 Upper
Mil-Spec stripped upper receiver (black)
16" 5.56 NATO Barrel
1:8 twist, mid-length gas (optimized for 55–77 gr)
15" Free-float Handguard
M-LOK compatible for accessories and rails
USA-Made BCG
Bolt carrier group manufactured in the USA
Complete Lower Parts Kit
Shooters Gate
332
2 weeks ago
The TacFire AR-10 .308 / 7.62x51 Unassembled Rifle Kit w/ Lower Parts Kit without Forward Assist includes a .308 / 7.62x51 bolt carrier group (BCG), charging handle, stripped upper receiver and port door, complete lower parts kit with fire control unit and pistol grip, gas tube and gas block, barrel with 1:10 twist and 5/8x24 threads, standard bird cage muzzle brake with crush washer, M-LOK® handguard, buffer kit (buffer spring, buffer weight, buffer tube, castle nut, and end plate), and adjustable butt stock. Product comes unassembled. Does NOT include lower receiver or forward assist
- UPC: 729205627958
- MPN: RK308NFA-20
2 weeks ago
SKU 51655106910
Brand Palmetto State Armory
Model Number 51655106910
UPC 51655106910
DETAILS
Barrel Length: 8"
Barrel Profile: Heavy
Barrel Steel: Chrome Moly Vanadium
Barrel Finish: Nitride
Chrome Lining: No
Muzzle Thread: 1/2-28
Chamber: 9mm (9x19)
Twist Rate: 1 in 10"
Barrel Extension: 9mm, Blowback
Muzzle Device: A2 Flash Hider
Receiver Material: 6061 Billet T6 Aluminum
Receiver Type: Slick Side
Handguard Type: PSA 7" Lightweight M-Lok Rail
Bolt Included: Yes
Bolt Steel: 8620, Nitride / Heat Treated
Build Kit: 9mm MOE EPT SBA3 Pistol Build Kit, Black
- MPN: 51655106910
1 week ago
SKU 51655238793
DETAILS
Condition: Used Surplus Non-Matching
These are milled kits and do not include front or rear trunnions
Kit Includes:
Complete Rear Sight Base (Installed on demilled receiver) with flip-up tritium rear sight
Complete Front Sight Base Assembly (Installed on demilled barrel) with flip up tritium sight
Complete Bolt
Carrier
Dust Cover
Recoil Assembly
Gas Tube
Fixed Stock
Stock Screws
Handguard Retainer
Pistol Grip with screw
Upper & Lower Handguards
Fire Control Group
Safety
Cleaning Rod
FEATURES
4 days ago
This ambidextrous rifle kit from Matrix Diversified Industries (MDI) features Magpul Original Equipment (MOE) Gen 2 Commercial-Spec components and is perfect for turning an AR-15 into a personalized modern sporting rifle. Each kit contains an MOE carbine buttstock, MOE carbine hand guard, MOE pistol grip, MOE Vertical Grip (MVG), MOE trigger guard, and one 10-round PMAG magazine. The components are pre-dipped in the Kryptek Mandrake finish, so the furniture arrives ready for installation.
Manufacturer Matrix Diversified Ind
Pricing Unit EA
Model Magpul Carbine Accessory Kit
- UPC: 819713010790
- MPN: MAGCOM61KM
3 days ago
,
by Dealer
Key Features
Forged 7075-T6 Upper
Black Forged 7075-T6 Mil-Spec Stripped Upper Receiver
10.5" 300 Blackout Barrel
10.5" 300 Blackout Barrel
Dust Cover & Forward Assist
Black Dust Cover
Black Forward Assist
Gas System
Gas Block .750
10 hours ago
$315 Bare Necessities Builder's Grade Complete AR-15 Rifle Build Kit This complete AR-15 rifle build kit is designed to provide an affordable yet high-quality build solution. Perfect for first-time builders or those looking for a budget-friendly option, this kit contains everything you need to assemble a functional AR-15 without breaking the bank.
- MPN: BG1655612OCT-BLK-LBK
9 hours ago
1 × NBS 16" 5.56 Gov / SOCOM Midlength M-LOK Upper Assembly - Black
1 × NBS .223/5.56 Bolt Carrier Group - Black Nitride
1 × Mil-Spec Carbine Buffer Kit
1 × MFT BATTLELINK Minimalist Stock - Mil Spec - Black - OEM
1 × MFT ENGAGE Pistol Grip Gen 2 - Black - OEM
1 × NBS Enhanced AR-15 Mil-Spec Charging Handle
1 × OEM Mil-Spec AR-15 Lower Parts Kit
This kit contains all the parts needed to build a fully-functional rifle except the lower receiver.
Customers are responsible for ensuring that when assembling kits, they must adhere to all Local, State, and Federal laws.
