About 300 Arms

300 Arms is a custom firearm maker located in Northern Colorado. We specialize in hand building firearms, laser engraving, CeraKoting and GunKoting. We also carry a full line of gun parts and accessories, including magazines, for all your shooting needs.

Featured Products

Custom 5.56 Harley Quinn AR-15 by 300 Arms Corp
$1,479.00 $1,379.00 Sale
Out of Stock.
Custom Virus Outbreak Response Team (VORT) 10.5' 300 Blackout Pistol
$1,449.00 $1,199.00 Sale
Contact us for pre-order information 970-632-2729
80% AR-15 Billet Anodized Blue Lower
$149.00 $139.00 Sale
In Stock.
5.56 Nato Complete Carbine Upper
$649.00 $599.00 Sale
In Stock.
SBPDW Pistol Stabilizing Brace
$259.00 $229.00 Sale
In Stock.

Visit us at local gun shows or shop online

We love our customers, so come see us at the gun shows in Loveland, Longmont, Greeley, Denver, Colorado Springs and Pueblo.

Firearms | 80% Lowers | Magazines | Ejection Port Covers | Charge Handles


300 Arms Corp

Wellington, Colorado, United States
(970) 632-2729


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