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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Battle Arms Adjustable AR-15 Pistol Grip - Black
$25.00Battle Arms Adjustable AR-15 Pistol Grip - Black 17 degree: Modern shooting techniques, “elbows in” stance 25 degree: Great “middle option” 33 degree: “A2 grip” originally seen 1960’s with “elbows...$25.00 -
On Sale
Battle Arms Development AR-15 Ambidextrous Safety Selector - Blue
Sale: $61.00MSRP: $65.00Battle Arms Development AR-15 Ambidextrous Safety Selector - Blue Ambidextrous Controls Reversible 0- 60 or 0- 90 Option Lightweight, Billet 7075-T6 Aircraft Grade Aluminum Ergonomic Lever Design for Positive Purchase Anodized Finish, BlueSale: $61.00MSRP: $65.00 -
Battle Arms Development AR-15 Ambidextrous Safety Selector - Purple
$65.00Battle Arms Development AR-15 Ambidextrous Safety Selector - Purple Ambidextrous Controls Reversible 0- 60 or 0- 90 Option Lightweight, Billet 7075-T6 Aircraft Grade Aluminum Ergonomic Lever Design for Positive Purchase Anodized Finish, Purple$65.00 -
Battle Arms Development AR-15 Ambidextrous Safety Selector - Red
$65.00Battle Arms Development AR-15 Ambidextrous Safety Selector - Red Ambidextrous Controls Reversible 0- 60 or 0- 90 Option Lightweight, Billet 7075-T6 Aircraft Grade Aluminum Ergonomic Lever Design for Positive Purchase Anodized Finish, Red$65.00 -
Battle Arms Sabertube QD Lightweight Stock Kit - Black
$199.95Battle Arms Sabertube QD Lightweight Stock Kit - Black Mil-Spec carbine buffer and buffer spring compatible QD sling attachment point Made in the USA$199.95 -
F.A.B. Defense Mag-well Grip and Funnel - FDE
$26.00F.A.B. Defense Mag-well Grip and Funnel - FDE Polymer Finger Grooves for a comfortable grip Fits AR-15$26.00 -
FORTIS SLS FIFTY SAFETY SELECTOR - BLACK
$69.95FORTIS SLS FIFTY SAFETY SELECTOR - BLACK Precise Manufacturing Long Term Reliability Durable Construction$69.95 -
Grid Defense Complete AR-15 Rifle Parts Kit - FDE
$124.99Grid Defense Complete Rifle Parts Kit - FDE Lower Parts Kit FDE Cerakote Trigger Group FDE Cerakote A2 Grip Buffer Retainer Pin Buffer Retainer Spring Trigger Guard Safety Selector Bolt Catch...$124.99 -
Magpul MOE Polymer Trigger Guard - OD Green
$9.95Magpul MOE Polymer Trigger Guard - OD Green Constructed from Advanced Polymer Compatible with the AR15/M4 Platform All Mounting Hardware Included Made in the USA Easily installed without the use of specialized tools Ergonomic and enlarged...$9.95 -
Out of stock
Magpul PMAG 30rd Engraved .223/5.56 Magazine - Black
$30.95Magpul PMAG Gen M2 MOE 30rd .223/5.56 Magazine - Black 30-round reliability with no stoppages Flared floorplate aids magazine handling and disassembly and is slim enough for use with many double and triple pouches The anti-tilt, self-lubricating...$30.95 -
Magpul PSR GEN3 Precision Adjustable Stock - Black
$259.95Magpul PSR GEN3 Precision Adjustable Stock - Black Machined aluminum LOP and Cheek Piece adjustment knobs Steel adjustment shafts finished with Melonite Bottom M-LOK slots for sling or monopod$259.95 -
MIL-SPEC PISTOL BUFFER TUBE - BLACK
$20.00MIL-SPEC PISTOL BUFFER TUBE - BLACK Made From: Forged 7075 aluminum Hard Coat Black Anodized Finish **Buffer, Castle Nut, End Plate Not Included**$20.00 -
MIL-SPEC PISTOL BUFFER TUBE - TEQUILA SUNRISE
$25.00MIL-SPEC PISTOL BUFFER TUBE - TEQUILA SUNRISE Made From: Forged 7075 aluminum Tequila Sunrise Cerakote Finish **Buffer, Castle Nut, End Plate Not Included**$25.00 -
Mission First Tactical Engage AR Pistol Grip V2 - Black
$19.99Mission First Tactical AR Pistol Grip V2 - Black Black finish Version 2 No finger grooves 15 degree angle Tab covers the receiver gaps$19.99 -
Radian Talon Ambidextrous 45/90 Degree Safety Selector - Gray
$69.95Radian Talon Ambidextrous 45/90 Degree Safety Selector - Gray Designed & Manufactured in the USA 2-Lever Combo: Short + Long Levers Machined from Billet aircraft grade aluminum w Milspec Type 3 Hard Coat Anodized Finish or Cerakote Center Shaft...$69.95 -
Rise Armament AR-15 Magazine Release Button - Black Anodized
$9.99RISE AR-15 Magazine Release Button Sleek, ergonomic design Anti-slip horizontal grooves Simple installation Precision machined from 6061 aluminum$9.99 -
Rise Armament AR-15 Magazine Release Button - Graphite
$9.99Rise Armament AR-15 Magazine Release Button - Graphite Sleek, ergonomic design Anti-slip horizontal grooves Simple installation Precision machined from 6061 aluminum$9.99 -
Seekins Precision Safety Selector - Red
$59.00Seekins Precision Safety Selector - Red Ambidextrous 60 Degree Short Throw 90 Degree Standard Throw$59.00 -
Strike Industries AR-15 Modular Bolt Catch
$34.95Strike Industries AR-15 Modular Bolt Catch Modular design to easily change between different bolt catch deigns 4 different buttons included (Standard, Oversized, Left Extended and Right Extended) Compatible with Mil-Spec AR-15 lower receivers$34.95 -
Strike Industries AR-15 Shift Pins
$23.95Strike Industries AR-15 Shift Pins Size: Pivot Pin:Length: 1.31” Take Down Pin:Length: 1.08” Weight (set): 0.52oz Gross Packaged Weight: 0.7oz Materials: CNC Steel Finish: Gold: Gold plating Chrome: Chrome Plating Contents: 1x Pivot...$23.95