05-20-2014, 07:11 AM
Hi Joker31
I do have a .223 20" rifle length Noveske Switchblock in use on my Grendel. Due to the fact that my Grendel is brand new and I shot about 83 rounds through it my experience with the Switchblock is limited. But I can give you this info so far:
1. my gasport diameter is 2.7mm / 0,1062
2. It was drilled at rifle length position
3. the gun runs flawlessly in nomal mode (selector to right position)
4. the selfloading mechanism is blocked in the "0" position
5. the "S" position (selector to left position) resulted in a double feed with Hornady 123 grs A-MAX factroy ammo during a five shot group. I could feel the drastically decreased bolt carrier speed. I will keep an eye on that and give you more info asap
The only advise I can give so far ist to keep the mechanism well oiled (I used KG-4) to avoid a fretting of the powder residue.
I do have a .223 20" rifle length Noveske Switchblock in use on my Grendel. Due to the fact that my Grendel is brand new and I shot about 83 rounds through it my experience with the Switchblock is limited. But I can give you this info so far:
1. my gasport diameter is 2.7mm / 0,1062
2. It was drilled at rifle length position
3. the gun runs flawlessly in nomal mode (selector to right position)
4. the selfloading mechanism is blocked in the "0" position
5. the "S" position (selector to left position) resulted in a double feed with Hornady 123 grs A-MAX factroy ammo during a five shot group. I could feel the drastically decreased bolt carrier speed. I will keep an eye on that and give you more info asap
The only advise I can give so far ist to keep the mechanism well oiled (I used KG-4) to avoid a fretting of the powder residue.