Receivers & Frames
The foundation of your next custom build. Browse our selection of receivers and frames, including stripped lower receivers, forged/billet upper receivers, ambi controls, and serialized handgun frames to start your project legally and correctly.
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Out of stockOn Sale
Knights Armament - Upper Receiver Kit SR-30 MOD 2 - 9.5" - 32310
Knights Armament Company
Now: $2,311.47Was: $2,433.12Knight's SR-30 E3 MOD 2 takes advantage of the .300 BLK, offering a 9.5" barrel for a significantly more transportable and maneuverable firearm. The QDC compatible Flash Hider will mount any of the KAC 7.62mm QDC suppressors. The SR-30 has 99% parts...Now: $2,311.47Was: $2,433.12 -
Out of stockOn Sale
Knights Armament - Upper Receiver SR-15 MOD 2 URX 4 M-LOK 5.56 mm NATO 18" - 32309
Knights Armament Company
Now: $2,311.47Was: $2,433.12The SR-15 E3 Mod 2 5.56 mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E3 round-lug bolt design both enhances function and increases bolt life. The 5.56 mm 3-Prong Flash...Now: $2,311.47Was: $2,433.12 -
Out of stockOn Sale
Knights Armament - SR-15 Carbine Mod2 Complete Upper - 14.5 E3 Mod 2 - #31949
Knights Armament Company
Now: $2,088.62Was: $2,198.54The SR-15 E3 MOD 2 series’ 5.56mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E3 round-lug bolt design both enhances function and increases bolt life far beyond the...Now: $2,088.62Was: $2,198.54 -
Out of stockOn Sale
LMT Defense - Short Rail Mount Pistol Grip Frame - L2X1PG
LMT Defense
Now: $823.50Was: $940.50LMT Defense Short Rail Mounted M203 Grenade Launcher Pistol Grip Frame. Does not include receiver or barrel. Allows for mounting of L2X launchers.Now: $823.50Was: $940.50 -
LMT Defense - Barrel Mount Complete Frame - L2H1PG
LMT Defense
MSRP: $1,329.00$1,232.10The LMT Defense Barrel Mount Complete Frame (L2H1PG) is the complete mounting frame for the LMT rail-mounted M203 grenade launcher system. This frame provides the structural mounting interface between the M203 receiver and Picatinny rail, including all...MSRP: $1,329.00$1,232.10 -
Out of stockOn Sale
LMT Defense - Rail Mount Complete Frame
LMT Defense
Now: $1,196.10Was: $1,232.10LMT Defense Rail Mounted M203 Grenade Launcher Complete Frame. Includes pistol grip and SOPMOD buttstock. Does not include receiver or barrel. Allows for mounting of L2B and L2D launchers.Now: $1,196.10Was: $1,232.10 -
Out of stockOn Sale
LMT Defense - Short Rail Mount Complete Frame - L2X1S
LMT Defense
Now: $1,196.10Was: $1,232.10Short Rail Mounted M203 Grenade Launcher Complete Frame. Includes pistol grip and PDW buttstock. Does not include receiver or barrel. Allows for mounting of L2X launcherNow: $1,196.10Was: $1,232.10 -
Out of stock
LMT Defense - Shorty 40 Receiver - L2X1
LMT Defense
MSRP: $1,743.00$1,616.40LMT Defense 40mm M203 “Shorty 40″ variant. Designed to be mounted to any standard 1913 Picatinny rails. Does not include barrel or sight. Includes three recoil lugs and three locking lugs to hold to rail. Built from...MSRP: $1,743.00$1,616.40 -
Out of stock
Heckler & Koch - MR556 Complete Upper Receiver Kit - 81000584
Heckler & Koch
$2,069.00The MR556A1 Upper Receiver Kit includes a complete upper receiver/barrel assembly, bolt carrier assembly, buffer, and buffer spring allowing most high-quality 5.56 mm AR-style rifles to be retrofitted to HK’s pusher rod system. The Upper Receiver...$2,069.00 -
Out of stockOn Sale
Knights Armament - SR-25 Upper Receiver - 20" - 111472
Knights Armament Company
Now: $4,114.69Was: $4,331.25Knights Armament SR-25 upper receiver kit, chambered for 7.62x51mm. Featuring Knight’s 20” cut rifled, precision barrel and their newly designed 3-prong QDC flash hider, the 20” Precision Rifle upper is the ultimate choice in the...Now: $4,114.69Was: $4,331.25 -
Out of stockOn Sale
Knights Armament - SR-25 Lower Receiver Assembly 7.62 NATO - No stock - #116858
Knights Armament Company
Now: $1,604.73Was: $1,689.19Built to the same standards as the complete SR-25 rifles, this lower receiver assembly features ambidextrous bolt, selector, and magazine releases, providing left-handed users with the advantages of AR-15 style controls, while offering right-handed users...Now: $1,604.73Was: $1,689.19 -
Out of stockOn Sale
Knights Armament - SR-30 Lower Receiver Semi-Auto .300 Blackout - #31742
Knights Armament Company
Now: $1,007.82Was: $1,060.29The Knight's Armament SR-30 IWS Complete Lower Receiver comes with with a SopMod stock and ambidextrous controls. Complete Lower SopMod Stock Ambidextrous ControlsNow: $1,007.82Was: $1,060.29