Gun Parts
Whether you’re looking for a quality trigger upgrade for your Glock® pistol or AR-style carbine, an ergonomic pistol grip for your sporting rifle, drop-in magwell upgrade, or an ergonomic pistol brace, we at GunMag Warehouse offer a wide selection of gun parts and upgrades from top-selling brands like SB Tactical®, Magpul®, Tyrant Designs®, Sig Sauer®, and more. Shop our full collection of gun parts today!
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Panzer Arms AR57 ULT AR-15 Steel 5.7x28mm Upper Receiver w/ M-LOK Handguard$644.99 $599.99 $619.99 Save $45.00 -
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TacFire AR-15 16" 9mm Unassembled Upper Receiver Kit w/ Lower Parts Kit$499.99 $319.99 Save $180.00 -
TacFire AR-10 .308 / 7.62x51mm Low Profile Unassembled Upper Receiver Kit$599.99 $374.99 Save $225.00 -
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TacFire AR-10 .308 / 7.62x51 Unassembled Rifle Kit w/ Lower Parts Kit without Forward Assist$599.99 $404.99 Save $195.00 -
TacFire AR-15 16" .45 ACP Unassembled Upper Receiver Kit w/ Lower Parts Kit$399.99 $339.99 Save $60.00 -
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TacFire AR-15 16" .300 Blackout Unassembled Rifle Kit w/ Lower Parts Kit$429.99 $339.99 Save $90.00 -
TacFire AR-15 16" .350 Legend Unassembled Upper Receiver Kit w/ Lower Parts Kit$399.99 $349.99 Save $50.00 -
Battle Arms Development WORKHORSE Mod C AR-15 16" CMV 5.56 Upper Receiver w/ 15" M-LOK HandguardOut of stock$692.99 $659.99 Save $33.00 -
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Battle Arms Development Authority Elite AR-15 16" CMV 5.56 Upper Receiver w/ 15" M-LOK Handguard$865.99 $824.99 Save $41.00 -
Battle Arms Development Authority Elite Mod C AR-15 16" CMV 5.56 Upper Receiver w/ 15" M-LOK Handguard$865.99 $824.99 Save $41.00 -
Spike's Tactical M4 Carbine AR-15 16" CMV 5.56 Upper Receiver w/ BAR2 9" Picatinny Handguard$826.99 $743.99 Save $83.00 -
Faxon ARAK-21 AR-15 5.56 NATO Upper Receiver w/ Picatinny HandguardOut of stock$999.99 $920.99 Save $79.00 -
Spike's Tactical AR-15 16" CHF 5.56 Upper Receiver w/ Mid Length Polymer Handguard$700.99 $630.99 Save $70.00 -
Geissele Automatics Super Duty MOD1 AR-15 13.9" Pinned / 16" OAL 5.56 Upper Receiver with Free Float M-LOK HandguardOut of stock$1,325.99 $1,450.99 -
Luth-AR Lightweight AR-15 16" CMV 5.56 Upper Receiver w/ 15" Palm KeyMod Handguard$439.99 $413.99 Save $26.00 -
Geissele Automatics Super Duty MOD1 AR-15 14.5" Pinned / 16" OAL 5.56 Upper Receiver with Free Float M-LOK HandguardOut of stock$1,325.99 $1,450.99 -
Spike's Tactical Lightweight AR-15 14.5" Pinned CMV 5.56 Upper Receiver w/ CRR 12" Picatinny Handguard$1,006.99 $905.99 Save $101.00 -
Battle Arms Development WORKHORSE AR-15 16" CMV 5.56 Upper Receiver w/ 15" M-LOK Handguard$724.99 $692.99 Save $32.00 -
Daniel Defense M4A1 AR-15 14.5" Pinned CMV 5.56 Upper Receiver w/ RIS II Handguard$1,660.99 $1,544.99 Save $116.00 -
TacFire AR-15 .223 / 5.56 Unassembled Upper Receiver KitOut of stock$399.99 $264.99 $299.99 Save $135.00 -
TacFire AR-15 16" 5.56 Unassembled Upper Receiver Kit w/ Lower Parts KitOut of stock$399.99 $329.99 Save $70.00 -
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Nordic Components 22RB AR-15 16" SS .22 LR Upper Receiver w/ M-LOK HandguardOut of stock$610.99 $549.99 Save $61.00 -
Odin Works AR-10 16" SS .308 Upper Receiver with 15" O2 Lite M-LOK HandguardOut of stock$1,149.99 $1,091.99 Save $58.00 -
FN FN15 / AR-15 16" CHF / CL 5.56 NATO Upper Receiver w/ Carbine A2 HandguardOut of stock$923.99 $599.99 Save $324.00 -
Geissele Automatics Super Duty MOD1 AR-15 16" 5.56 NATO Upper Receiver with 15" SMR MK16 M-LOK HandguardOut of stock$1,325.99 $1,450.99 -
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TacFire AR-15 7.62x39 Unassembled Upper Receiver KitOut of stock$449.99 $299.99 $309.99 Save $150.00
