FLOP STOP – Includes AR-15 PIN PAL by Cross Armory


  • Reduces separation of upper & lower receivers when pivoted about the front takedown pin
  • Comes with Cross Armory PIN PAL
  • PIN PAL is made from 4140 Ordnance Steel with melonite hard coat
  • FLOP STOP cures the common symptoms of the Limp Barrel Syndrome or L.B.S.
  • Fits all AR-15 & M4 rifles

Cross Armory’s FLOP STOP holds the upper receiver of you AR-15 in the open position, allowing for faster, more convenient reloads.

In stock

Complete the build

Not sure what else you need to have the fastest California reloading system? Check out these products that work with FLOP STOP:

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    QUICK PINS by Cross Armory


    • One Pinch upper and lower receiver release system for MIL spec AR-15 and M4 rifles
    • Instantly and securely locks the receivers together
    • Easier To Operate than standard takedown pins
    • Built from High Strength 7075 Aircraft Aluminum
    • Pairs with Cross Armory’s SAFE MAG, SAFE MAG 2 or AR FIXED MAG, for a superior reloading system in regulated states
    • If you do, you will need the a2 Spacer, click HERE
    • If you are not sure, click HERE and see if you have one


    SAFE MAG – MIL-SPEC AR15/M4 only by Cross Armory


    • Fixed magazine locking system for MIL-SPEC AR-15 and M4 rifles
    • Automatic Magazine Release when upper and lower receivers are separated, no need to push a button
    • QUICK and SAFE fixed magazine release device
    • SAFE MAG prevents the removal of the magazine from your AR-15 or M4 rifle without disassembly of the action when properly installed
    • QUICK, EASY installation
    • RELOAD EASIER when separating the upper from the lower receiver


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Typical compliance reloads involve separating the upper receiver from the lower receiver.  When the receivers are opened, the weight of the barrel causes the upper receiver to fall forward, pinching fingers and creating an unstable and dangerous weapon.  With Cross Armory’s FLOP STOP, the upper receiver and barrel are held open by the Flop Stop, allowing for faster and safer reloads.  When paired with Cross Armory SAFE MAG and QUICK PINS, you can reload with a flick of the wrist…literally.

Cross Armory’s FLOP STOP holds the upper receiver of you AR-15 in the open position, allowing for faster, more convenient reloads.

Cross Armory’s Flop Stop is designed to work in harmony with other Cross Armory AR compliance products, but is not limited to Cross Armory products.  

Cross Armory respects your right to choose what products you equip your AR with, so the FLOP STOP is designed to work with ALL other compliance products as well.  So if you bought a modified aftermarket fixed magazine locking device of any kind, FLOP STOP is compatible and will help make your AR function better.

IF you have already purchased Cross Armory PIN PAL, FLOP STOP will easily slide onto your current PIN PAL. Purchase just the FLOP STOP without the PIN PAL here

INSTALLATION if you have a Black PIN PAL Bearing

INSTALLATION if you have a Silver PIN PAL Bearing


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