I mounted mine on a Colt AR-15 with 16" barrel & collapse stock(M4 look)that I have had for over 20yrs. Tri rail on stock handguard. The new grip had no side to side slack but slight bck/fwd and was easily fixed with a sleeve placed in tri rail. Grip folds forward so I can use stock handguard for normal shooting W/O special gloves or rubber tabs needed.
Pros: Comfort, versatile, looks, & value.
Cons: Had to sleeve bolt to remove slight back/fwd slack,
This review was written in the old system and had content requirements that are different than reviews written today.