Have you heard of Bootleg Builder Inc? You may not know who they are but I know you’ve seen their parts!! Bootleg Builder is a sister company to Primary Weapons Systems offering DI (Direct Impingement) models of many PWS components such as upper receivers, handguards, low profile gas block, charging handle, adjustable BCG, etc. Right now they are having a SUMMER SALE! All you need to do is head on over to their website and use the discount code SUMMER to get $50 off your purchase of $369.99 or more!