02-18-2014, 07:07 PM
@TheDroz66
The ERA TAC mount you see on my pics is designed especially for the S&B 5-20x50, illuminated, Ultra Short.
The ERA TAC model no. is of the mount is: T1001-267A,
I combined it with the ERA TAC bubble level attachment and the ACI from snipertools.
ERA TAC model no. ACI: T0941-000
ERA TAC model no. attachment & bubble level: T0940-000
@LRRPF52
It was my plan to build up an AR-15 which only includes absolute top notch parts. It took almost two years to reach "assembly readyness level"
We (my gunsmith and me) were on the range Saturday 8th of February, we fired a few rounds and checked the proper working of the rifle (I made a movie which will be available on YOUTUBE soon). We found out the following:
1. A gas port diameter of 2.5 mm results in a repeating process at the lower area of operation but without malfunction. The recoil is very low and the cases only hop out of the chamber (45° behind, app. 30 -50 cm away) with a Noveske Switchblock 20" rifle at "normal" position.
2. Attaching the B&T silencer and turning the Switchblock to "Silencer" mode resulted in an ejection of the used case but the bolt did not travel far enough backwards to feed the subsequent round.
3. Considering the results of 1. & 2., we will open up the gas port diameter to 2.6mm in order to achieve an sufficient gas pressure in "Normal" and "Silencer" Mode of the Noveske switch block - this should ensure margin against lower loads (the tests were perfomed with 27grs. N140, 57mm O.A.L, 123grs. Sierra Matchking)
4. I knew it in advance but the PRI stuff lacks a little bit of precision:
4.1 The Delta Handguard should contain slotted holes on the 12 o´clock position where the SPR Rail is attached. After assembly of the upper reciever we found out that the through-holes that should fit to the rail of the upper receiver didn´t fit. Slotted holes would enable to adjust the position of the SPR Rail with respect to the upper receiver.
4.2 The PRI iron sight set I ordered is practically incompatible with the SPR Rail. The rear sight is mounted on upper receiver level, the frontsight is mounted to SPR Rail level, this results in a cant which can not be compensated in any way except of a front sight modification - this is a part which really sucks because I knew it in advance and PRI didn´t make any move to solve that problem. It could be possible to switch to a TROY combination of a regular rear sight and a micro frontsight, unfortunately this package is not available. I think I have to disassemble the frontsight and shorten it (if possible). Otherwise I would have to give it without frontsight to the magazine review.
5. The best news is: The 6.5 Grendel got C.I.P listed in May 2013!! LINK to CIP Website
CIP Technical Datasheet
And Hornady had their 123 grs. A-Max ammunition for a C.I.P. listing test in Mellrichstadt - Germany a few weeks ago. That ammo is CIP listed now and can be purchased at every shop which sells Hornady Ammo.
The ERA TAC mount you see on my pics is designed especially for the S&B 5-20x50, illuminated, Ultra Short.
The ERA TAC model no. is of the mount is: T1001-267A,
I combined it with the ERA TAC bubble level attachment and the ACI from snipertools.
ERA TAC model no. ACI: T0941-000
ERA TAC model no. attachment & bubble level: T0940-000
@LRRPF52
It was my plan to build up an AR-15 which only includes absolute top notch parts. It took almost two years to reach "assembly readyness level"
We (my gunsmith and me) were on the range Saturday 8th of February, we fired a few rounds and checked the proper working of the rifle (I made a movie which will be available on YOUTUBE soon). We found out the following:
1. A gas port diameter of 2.5 mm results in a repeating process at the lower area of operation but without malfunction. The recoil is very low and the cases only hop out of the chamber (45° behind, app. 30 -50 cm away) with a Noveske Switchblock 20" rifle at "normal" position.
2. Attaching the B&T silencer and turning the Switchblock to "Silencer" mode resulted in an ejection of the used case but the bolt did not travel far enough backwards to feed the subsequent round.
3. Considering the results of 1. & 2., we will open up the gas port diameter to 2.6mm in order to achieve an sufficient gas pressure in "Normal" and "Silencer" Mode of the Noveske switch block - this should ensure margin against lower loads (the tests were perfomed with 27grs. N140, 57mm O.A.L, 123grs. Sierra Matchking)
4. I knew it in advance but the PRI stuff lacks a little bit of precision:
4.1 The Delta Handguard should contain slotted holes on the 12 o´clock position where the SPR Rail is attached. After assembly of the upper reciever we found out that the through-holes that should fit to the rail of the upper receiver didn´t fit. Slotted holes would enable to adjust the position of the SPR Rail with respect to the upper receiver.
4.2 The PRI iron sight set I ordered is practically incompatible with the SPR Rail. The rear sight is mounted on upper receiver level, the frontsight is mounted to SPR Rail level, this results in a cant which can not be compensated in any way except of a front sight modification - this is a part which really sucks because I knew it in advance and PRI didn´t make any move to solve that problem. It could be possible to switch to a TROY combination of a regular rear sight and a micro frontsight, unfortunately this package is not available. I think I have to disassemble the frontsight and shorten it (if possible). Otherwise I would have to give it without frontsight to the magazine review.
5. The best news is: The 6.5 Grendel got C.I.P listed in May 2013!! LINK to CIP Website
CIP Technical Datasheet
And Hornady had their 123 grs. A-Max ammunition for a C.I.P. listing test in Mellrichstadt - Germany a few weeks ago. That ammo is CIP listed now and can be purchased at every shop which sells Hornady Ammo.