The Mega Arms LM4 GBBR is a game changer for the airsoft world. The LM4 brings together two characteristics of gas blowback rifles that traditionally remain separate, affordability and reliability. The LM4 has taken many years to engineer and assemble and it's finally ready to come to market. The majority of the gun is constructed of aluminum, such as the receivers, barrel, and buffer tube, while the hand guard, pistol grip, and stock are constructed of a high grade polymer, just like a real rifle would be. The bolt movement is crisp and the recoil is very direct, and feeling that this gun gives you while being fired is unmatched by any other gas blowback M4 on the market. The construction and feel of the gun are second to none.

Another very impressive feature of the LM4, and one of the key components in making the gun operate smoothly as it does is the magazine. The magazine holds the gas to operate the gun and the 40 rounds of ammunition. The top of the LM4 PTR Magazine is made of high impact polymer whereas the rest of the magazine is made of metal. PTS has done this for two reasons; first, the top of the magazine will be much more resistant to breaking if dropped, and second, the magazine top and feeding lip can be replaced and the magazine can be rebuilt should it become necessary. The LM4 is an amazing rifle that has been engineered from the ground up to be the first and last gas blowback M4 that you will ever need to buy.