TheAT3 Tactical MOTHERFU-BAG parts kit for the AR15 is a large package of spare springs, pins and gas rings that every AR15 carbine user should have. When tuning or disassembling an AR15 carbine, we often experience situations of losing small, but essential parts for the proper functioning of the weapon. Usually it is a micro spring, which, when fired like a catapult, disappears into the depths of the workshop, or a small pin, which, like a sniper, camouflages itself in the hairy carpet. At such moments, Americans use the acronym FUBAR, which in cultural and simplified translation means: "we're screwed." To avoid experiencing this frustrating situation, it is worthwhile to stock up in advance with a large set of spare pins, springs and gas rings, the MOTHERFU-BAG set. All of the kit's components meet Mil-Spec specifications and come with a lifetime manufacturer's warranty. The AT3 Tactical MOTHERFU-BAG kit includes: Hammer Spring (cocking spring) Trigger Spring (trigger spring) disconnector Spring (cock catch spring) 2 × Hammer/Trigger Pin (cock/trigger pin) 2 × Firing Pin Retainer (bipartite firing pin) 3 × Gas Ring (gas ring) extractor O-Ring (extractor claw seal) extractor Spring (extractor claw spring) bolt catch plunger (breech drop pawl/lock) bolt catch roll pin (breech drop spring pin) bolt catch spring (breech drop spring) buffer retainer (return device stop) buffer retainer spring (return device stop spring magazine catch spring (magazine catch spring) selector detent (fuse latch/lock) selector detent spring (fuse lock spring) 2 x Takedown/Pivot pin detent (latch/pivot pin lock) 2 x Takedown/Pivot pin detent spring (latch/pivot pin lock spring) trigger guard roll pin (bail spring pin) Mil-Spec Disconnector Spring (cocking catch spring) 2 x Gas Tube Roll Pins (gas tube spring pin)