NLX 556 GFK Pistol- The Handiest AR15 Without Sacrifices The NLX5.56GFK Pistol sports many of the same features as the classic GFK, in a much handier package. Equipped with an SBA3 pistol brace, Next Level Armament's new NLX-25 556 linear compensator, and a American made quality LPK, you receive a well built pistol that you can rely on in any situation. 100% USA Made Products. Standard Equipment on the GFK: Barrel - 7.5' or 11.5' 5.56 Rosco Bloodline Handguard - Next Level Armament MLOK Handguard Trigger - Mil-Spec Trigger Grip - B5 systems Type 23 Brace - SBA3 Magazine - Magpul P-Mag 30 round