Lower Parts
Looking to get new parts for your AR's lower receiver. This is the place to look, with hundreds of parts from stocks and grips to a new mag release button. Shop with Grid Defense to customize and build the best lower receiver you can. Make your firearm look, feel, and perform the best with our selection of OE and aftermarket parts.
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Out of stockOn Sale
SB Tactical SBA5 Adjustable Pistol Brace With Grid Defense Buffer Tube Kit - Black
Sale: $119.95MSRP: $169.95SBA5 with Grid Defense Buffer Kit - Black SB Tactical SBA5 Pistol Stabilizing Brace Complete Grid Defense Buffer Tube Assembly Kit Carbine buffer (3 oz) Carbine buffer spring Carbine stock end plate Carbine stock lock ring-castle nutSale: $119.95MSRP: $169.95 -
Odin Works ZULU Adjustable Stock Kit - Black
$149.00Odin Works ZULU Adjustable Stock Kit - Black Made from 6061 aluminum and Limbsaver recoil pad Secondary Buffer System Reduces Recoil Weight: 1.23 lbs Kit includes: -ZULU Adjustable Stock -Padded Intermediate Buffer Tube -Ambi Sling/QD...$149.00 -
On Sale
Strike Industries AR10 Enhanced Bolt Catch - Black
Sale: $14.35MSRP: $15.95Strike Industries AR10 Enhanced Bolt Catch - Black MilSpec bolt catch Wide surface area bolt catch latch for enhanced operation Solid steel construction Sleek SI Design Compatible with AR-10 DPMS/LR-308 & SR-25 pattern lower...Sale: $14.35MSRP: $15.95 -
BRAVO COMPANY GUNFIGHTER SOPMOD 0 ADJUSTABLE STOCK - BLACK
$64.00BRAVO COMPANY BCMGUNFIGHTER MOD 0 STOCK - BLACK The strongest light-weight polymer stock available for your mil-spec receiver extension More pronounced cheekweld-SOPMOD type (widebody)$64.00 -
Out of stock
UTG Model 4 Combat Ops S1 Stock Kit - Black
$72.97UTG Model 4 Combat Ops S1 Stock Kit - Black lack finish 6-position adjustable/collapsible Includes: extension tube" buffer" buffer spring" tear-drop ring & castle nut AR-15/M4 style stock$72.97 -
F.A.B. Defense GCCP AR-15 Buttstock - Black
$88.00F.A.B. Defense GCCP AR-15 Buttstock - Black Collapsible Rubber Buttpad Cheek Riser Small Compact Design Fits Mil-Spec and Commercial Tubes$88.00 -
Strike Industries Advanced Receiver Extension - Black
$52.95Strike Industries Advanced Receiver Extension - Black 7075-T6 Aluminum Supported buffer retaining tab$52.95 -
Strike Industries AR-15 Lower Parts Kit No Fire Control Group
$60.95Strike Industries AR-15 Lower Parts Kit No Fire Control Group Enhanced Bolt Catch Strike Magazine Catch Enhanced Takedown Pin SI 60-90 Degree 3-in-1 Selector Shaft$60.95 -
ATI Outdoors AR-15 X2 Pistol Grip - Black
$29.99ATI Outdoors AR-15 X2 Pistol Grip - Black Fits most AR-15 and AR-10's V2 Sure Grip Texture Specifically Engineered Grip Dimensions Rear Tang & Curved Base Scratchproof & Weatherproof$29.99 -
Bravo Company Trigger Guard Mod 0 - Black
$8.00Bravo Company Trigger Guard Mod 0 - Black Ergonomically correct shape and contour No sharp edges, Compatible with "duck-billed" grips Made of impact resistant polymer$8.00 -
STRIKE INDUSTRIES BILLET TRIGGER GUARD - BLACK
$25.95STRIKE INDUSTRIES BILLET TRIGGER GUARD - BLACK Aircraft grade aluminum construction Magazine reload assist Cleaner, faster reloads Functions as safe trigger finger index rest Lightweight Weight 0.5 oz$25.95 -
Out of stock
Adaptive Tactical EX Lite Stock - Black
$34.99Adaptive Tactical EX Lite Stock - Black Only compatible with Mil-Spec sized extension tubes Covered take down pin makes installation and removal easier and eliminates discomfort M4-style stock with adjustable length-of-pull Easy to reach...$34.99 -
Out of stock
AR Enhanced Ambidextrous Safety Selector - Black
$20.99AR Enhanced Ambidextrous Safety Selector - Black For Left or Right-Handed Shooters Replaces Existing Safety Lever Easy-To-Operate Safety Lever on Both Sides of The Receiver Does Not Interfere with Grip Position or Thumb Placement Fits Semi-Auto ...$20.99 -
Out of stock
AR Enhanced Ambidextrous Safety Selector - Gold
$23.99AR Enhanced Ambidextrous Safety Selector - Gold For Left or Right-Handed Shooters Replaces Existing Safety Lever Easy-To-Operate Safety Lever on Both Sides of The Receiver Does Not Interfere with Grip Position or Thumb Placement Fits Semi-Auto ...$23.99 -
Out of stockOn Sale
AR-15 80% Lower With Fire/Safe Engravings | SBA4 | Mil-Spec LPK | Carbine Buffer Tube Kit
Sale: $189.99MSRP: $379.94AR-15 80% Lower With Fire/Safe Engravings | SBA3 Pistol Brace | Mil-Spec LPK | Carbine Buffer Tube Kit This AR-15 80% Lower Build Kit provides a solid foundation for your next custom rifle. Featuring an 80% lower receiver with Fire/Safe engravings, an...Sale: $189.99MSRP: $379.94 -
Elftmann Tactical Adjustable Trigger with Curved Shoe - Black
$139.00Elftmann Tactical Adjustable Trigger with Curved Shoe - Black Fits any and all AR platforms Incremental Adjustment Knob Drop-Safe Adjustable from 2 3/4lbs to 4lbs without removing from lower Patented Double-Double torsion hammer spring Short pull...$139.00 -
Out of stock
F1 Firearms GRP Style 1 Grip - Black
$79.99F1 Firearms GRP Style 1 Grip - Black Skeletonized and Textured Construction Type-1 No Finger Grooves Anodized Finish Fits AR Platform Rifles$79.99 -
Fortis Manufacturing AR-15 Takedown Pins - Rose Gold/Case Hardened
$22.95Fortis Manufacturing AR-15 Takedown Pins - Rose Gold/Case Hardened Mil-spec size tolerance from .247-.2485 Comes in either black nitride coating or case hardened finish Lightweight at 0.34 oz combined Material 17-4 Stainless Steel Made in the USA$22.95 -
F.A.B. Defense GL-Core S AR-15 Buttstock - Black
$55.99F.A.B. Defense GL-Core S AR-15 Buttstock - Black Collapsible Rubber Buttpad Small and Compact Design Fits Mil-Spec and Commercial Buffer Tubes$55.99 -
Maxim Defense CCS Gen 6 Stock - Black
$295.00Maxim Defense CCS Gen 6 Stock - Black Uses Standard Buffer 3 Postition Fits AR-15$295.00