Years ago the M11 was a popular GBB until people started to find out that the gun itself is a very delicate piece. The open bolt design causes many issues with the slightest dust drying out the gun or degrading any rubber parts. Since people stopped caring for the M11; many companies stopped making performance parts for the gun. Today it is very hard to come by these Performance Parts and when found; usually require people to order overseas.
Some of My Upgrades:
1. I have been able to increase the ROF by using an upgraded spring. But because I was not able to find an exact M11 spring I bought a Desert Eagle Recoil Spring Upgrade. I placed the 2 Desert Eagle Springs on top of each other so that the ends of the spring interlock without the top spring overlapping the bottom.
Arrow shows where the two springs interlock without overlapping.
2. Another Mod to help ROF is adding recoil pads to the hop up unit and to the rear of the lower body-where the spring rod touches the back. I used a piece of rubber I bought at the hardware store for $2 and cut it to size. In order for the bolt to blow back and activate the gas valve both rubber pieces need to be thin enough to allow this to happen. The thickness of both pieces are roughly 3-4mm. The pad in the rear shortens the distance of the blow back and keeps the spring in place while the pad in the front adds a slight bounce to throw the bolt back.
Picture of the Rear Rubber recoil pad.
Shows where this recoil pad goes. The arrows are pointing at scratch marks where the spring rod moves a lot. The rubber keeps the rod in place.
Picture of the front recoil pad glued on. I know it doesn't look pretty.
3. By adding these recoil pads the bolt remains open slightly but not enough to hinder the gun's performance. But since the bolt is slightly exposed I covered the open bolt with skateboard tape. I first cut a piece of plastic the size of the hole and then I taped that on the outside. I then cover that section with a long strip of skateboard grip tape. The tape makes it look nicer than just having an ugly piece of plastic on the outside.
Picture of the Grip Tape on the Gun. Looks strange but it keeps the dust out!
Anyways that's what I've done so far.
Edited by Villain, 08 October 2008 - 04:56 PM.