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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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 -
Out of stock
AR Ambidextrous Safety Selector
$20.99AR Ambidextrous Safety Selector Ambidextrous Safety Selector Fits AR 5.56/.223 CNC Machined out of Aircraft Grade Aluminum Mil-Spec Finish: Black Anodized Weight: .5 oz Choose between 45 degree short throw and 90 degree...$20.99 -
Out of stock
B5 Systems AR-15 Pistol Grip - Black
$20.00B5 Systems AR-15 Pistol Grip - Black Aggressive texture for increased retention. Accepts Battery Grip Plug. Made of Milspec material. Available in all standard colors.$20.00 -
Battle Arms Development EMMR Large Enhanced Modular Magazine Release - Red
$23.95Battle Arms Development EMMR Large Enhanced Modular Magazine Release - Red BAD-EMMR-L (Enhanced Modular Magazine Release - Large Finger Pad) for the AR15/AR10. Precision CNC Machined for billet 7075-T6 Aluminum, the BAD-EMMR features,...$23.95 -
BATTLEARMS 3 Piece Enhanced Lower Parts Kit
$35.00BATTLEARMS 3 Piece Enhanced Lower Parts Kit Enhanced Bolt Catch (BAD-EBC-IC), which is a cost-friendly alternative, without sacrificing the quality for your AR build! The AR-15 Cast Enhanced Bolt Catch is 8620 heat treated cast steel with a manganese...$35.00 -
Out of stock
Bravo Company Gunfighter's Grip Mod3 - FDE
$20.00Bravo Company BCMGUNFIGHTER Grip Mod3 - FDE Fits AR rifles Reduced angle for improved ergonomics Hinged trap door offering storage inside the grip Up to 1/4" wider than Mod 0 and Mod 1$20.00 -
Out of stockOn Sale
Grid Defense AR-15 80% Lower Receiver Without Fire/Safe Engravings 5 Pack - Raw
Sale: $200.00MSRP: $600.00Grid Defense AR-15 80% Lower Receiver 5 Pack - Raw Includes 5 Raw No Fire/Safe 80% Lower Receivers Machined from 7075 Forged Aluminum Made in house in the USA Flared and Broached Magwell Raw Aluminum Finish Does not have Fire/Safe Makings Can be...Sale: $200.00MSRP: $600.00 -
Grid Defense Pistol Stabilizing Fin - OD Green
$49.99Grid Defense Pistol Stabilizing Fin - Blue Titanium -Constructed from Reinforced Polymer -Increases Weapon Control and Stability -Weighs 5.7oz -Fits Pistol Buffer Tube up to 1.25" (Not Included) -Finished in OD Green Cerakote$49.99 -
Out of stock
HEXMAG AR15 ADVANCED TACTICAL GRIP - FDE
$29.99HEXMAG AR15 ADVANCED TACTICAL GRIP - FDE Fits AR-15 and AR-10 platforms 17 for pistols/SBRs" 25 degree for standard angle or 33 degree for long range Made from fiber-reinforced polymer HexMag's AR-15 Advanced Tactical Pistol Grip features a...$29.99 -
Out of stock
LUTH-AR MBA-2 Skullaton Fixed Stock
$49.95LUTH-AR MBA-2 Skullaton Fixed Stock Comes with A2 Buttstock screw to connect to A2 standard buffer tube Fits AR-15 & AR-10 Rifle Length A2 Buffer Tube Luth-AR's MBA-2 Fixed Rifle Stock is designed to mount to an AR-15 or AR-10 Rifle Length A2...$49.95 -
Magpul ACS Carbine Stock - Black
$89.95Magpul ACS Carbine Stock Compatible with Milspec Carbine Buffer Tube Dual Water Resistant Battery Storage Tubes Integral Storage Compartment Anti Snag Release Latch Friction Lock System to Minimize Stock Movement 0.30" Thick Butt Pad Made in the...$89.95 -
Mil-Spec Pistol Buffer Tube Assembly
$30.00 - $35.00Mil-Spec Pistol Buffer Tube Assembly Made in the USA 1.25" Outer Diameter Machined from 7075-T6 Aluminum End Plate Castle Nut Carbine Buffer Spring Carbine Buffer Available in Black Anodize and Cerakote Finishes$30.00 - $35.00 -
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 -
Odin Works ZULU Stock Kit - Red
$169.00Odin Works ZULU Stock Kit - Red 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 Plate Length of pull:...$169.00 -
PHASE5 WINTER TRIGGER GUARD - BLACK
$25.00BLACK PHASE 5 WINTER TRIGGER GUARD Newly Revised Useful Feature When Wearing Gloves Guard Shape Adds Visual Appeal Includes Allen Wrench, Roll Pin, Anti-Rattle Screw$25.00 -
Rise Armament Super Sporting Trigger with Anti-Walk Pins - Don't Tread On Me Edition
$139.00Rise Armament Super Sporting Trigger with Anti-Walk Pins - Don't Tread On Me Edition Clean break with a short reset Enhances accuracy by minimizing gun disturbance and allows faster initial and follow up shots when compared to a standard trigger...$139.00 -
On Sale
SB Tactical SBA3 Adjustable Pistol Brace With Grid Defense Buffer Tube Kit - Sniper Gray
Sale: $119.95MSRP: $169.95SBA3 With Grid Defense Buffer Kit - Sniper Gray SB Tactical SBA3 Pistol Stabilizing Brace - Sniper Gray Complete Grid Defense Buffer Tube Assembly Kit Carbine buffer (3 oz) Carbine buffer spring Carbine stock end plate Carbine stock lock...Sale: $119.95MSRP: $169.95 -
Out of stockOn Sale
SB Tactical SBA5 Adjustable Pistol Brace With Grid Defense Buffer Tube Kit - FDE
Sale: $119.95MSRP: $169.95SBA5 with Grid Defense Buffer Kit - FDE 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 -
Out of stock
SKELETONIZED ELITE TRIGGER GUARD - OLIVE DRAB
$25.99Premium Skeletonized Elite Trigger Guard - Olive Drab This Skeletonized trigger guard is the premium option from the Vital trigger guard that comes standard with all completed lowers. With it's slim design, it offers coverage where it is needed...$25.99 -
STRIKE INDUSTRIES AMBI MAGAZINE RELEASE - TITANIUM
$43.95Strike Industries AMBI Magazine Release Made in USA Low Profile and Ergonomically Designed Includes Enhanced Magazine Release Button and Spring for Complete Drop-in Upgrade Ambidextrous for The Left and Right Handed Shooters Manufactured by Strike...$43.95