Can/rail gap - Am I screwed?

[Uffdaphil]

I assumed my new Sionics 11.5" w/10" CMR rail would have plenty of clearance. But the actual rail length is 10 5/8". Looking at the pics below do you think I have a problem?

There is a 1/4" gap between the rail and the A2. About the same as between .30 cal taper mount and C4 rail. However the taper mount shrouds past the thread base a bit, maybe 1/8". And no crushwasher. So is my jailed Recce 5 going to be a no go? Seems like it might clear by a couple shims which would be great. Sure would hate to have to grind on the rail.
Attachment 2336
Attachment 2337

[alamo5000]

You'll be fine.

[alamo5000]

Based on my math if your barrel is a true 11.5 and with your measurements that leaves you 7/8 of an inch. (22.22 mm)

My 10.5 barrel with a 9.7 SLR rail leaves .8 inch (20.32mm)

I converted it to mm for apples to apples comparison. Don't worry about it man. It should be fine. A nice close fit in fact.

[Uffdaphil]

Thanks A5K. I had read 1-1.5" needed with slim rails and had run out of things to worry about. Retired life is too good sometimes.

[vivi00]

I can confirm fit with the Recce 5/7 on a BCM 11.5 w/CMR 10.5 combination. I'll snap a photo later when I have a chance if you'd like to see the gap.

That said, I did not use the GA shims that came with the mount, I just couldn't get it to time according to the instructions. At least not in a way that I felt comfortable with. The torque value was either too high or too low. I ended up using a Precision Armament Accu-Washer and Rocksett. So far so good...

[Former11B]

I can take a picture of my Recce 5 on the mount; the rear of the can doesn't come past where the bottom of the taper stops.

Edit:
Found this online:




You'll be fine

[Uffdaphil]

I see Centurion does list the rail at 10.5'. At Sionics the URG ad says 10".

11B - That's how my Recce 7 fits also.

Viv - I would love a shot of your BCM/Recce 5 setup. A full profile pic of the gun would be nice to give me an idea how mine will look.


Thanks all.

[FortTom]

Thanks A5K. I had read 1-1.5" needed with slim rails and had run out of things to worry about. Retired life is too good sometimes.

Ha..ha.... Yep...that's why my med kit contains nothing but Prilosec and Rolaids... I've second guessed myself a million times, immediately after pushing the "Pay Now" button on the vendors website.

FT

[vivi00]

Here you go, hopefully this will give you an idea.

[Uffdaphil]

Looks great! Thank you.

[vivi00]

Looks great! Thank you.

You're welcome, I love this combo!

[UWone77]

I like Cans with CMR Rails. Great combo especially on SBR's.

[Pyzik]

I assumed my new Sionics 11.5" w/10" CMR rail would have plenty of clearance. But the actual rail length is 10 5/8". Looking at the pics below do you think I have a problem?

There is a 1/4" gap between the rail and the A2. About the same as between .30 cal taper mount and C4 rail. However the taper mount shrouds past the thread base a bit, maybe 1/8". And no crushwasher. So is my jailed Recce 5 going to be a no go? Seems like it might clear by a couple shims which would be great. Sure would hate to have to grind on the rail.
Attachment 2337

Oooh that's gonna be hawt

[Joelski]

Ha..ha.... Yep...that's why my med kit contains nothing but Prilosec and Rolaids... I've second guessed myself a million times, immediately after pushing the "Pay Now" button on the vendors website.

FT

Here you go, hopefully this will give you an idea.

Sublime. Basic black really can't be beaten, and the CMR is such an elegant design. Classic!

[Joelski]

There ain't nothin' wrong with a little gap.