The RB-MC040 Leapers UTG M1 M2 Carbines Recoil Buttplate Butt Pad Adds 1" to rifle stock length. Butt Pad Fits all versions of M1 M2 Carbines. This M1 Carbine Butt Pad help to absorb the rifles recoil. Fits the original stocks on M1 M2 Carbines, This Butt Pad Helps Prevents slip and softens recoil. Easy to install No drilling or tapping required. One year limited warranty.