When I first took apart my Crosman 2300S Silhouette I was surprised to discover that the muzzle brake, which also includes the front sight post, is secured with a set screw on the bottom. Yet, the barrel has a flat right at the muzzle on the top. This means that whenever I remove and reinstall the muzzle brake, I have to rely on lining up the original set screw indent (gouged in by the original set screw installation) on the bottom of the barrel with the set screw hole in the brake. The result is a misalignment of the front sight requiring a new sighting in.
Common sense design dictates that one make use of the flat on the barrel as a set screw engagement surface. This helps ensure that reinstallation of the brake will rotationally align consistently. This reduces the need to re-sight in the weapon. But that has not happened here when Crosman designed this gun.
Does anyone know if a muzzle brake/post front sight replacement is made that makes use of the flat on top of the barrel? And a heavier brake would also be welcome.
Google searches come up with a couple of front sights on ebay, both of which are Crosman products with the set screw on the bottom. Not what I am looking for.
WOW, Crosman sure is proud of that post. I just tried putting a threaded sight post in the 1701-o23 Brake and the threaded sight post (2300-028 @$2.47) is just a bit larger. Some of the threads would have to be filed off. Not much though. 1701-024 Diam. is 0.121" The threaded post is 0.128"
I don't know why you would ever use the wide side of the -024 type sight post anyway.
Good point- wider isn't any help to me. Had I known then what I do now, I'd have used a small length of piano wire for the 1701P post.
On the 2300S brake, remove the sight post and temporarily replace it with a long 6-32 set screw to locate the brake long enough to tighten up the bottom screw, then remove and replace w/the sight post.
Post by John in Spokane on Jun 24, 2018 22:07:19 GMT
A cheap option if you don't mind tinkering a bit could be the Daisy weights that cobalt posted about a while back.
Also in the past, I've drilled and tapped a hole in the top of factory brakes that line up with the flat, other times I've filed flats or made divots on the bottom of the barrel and cold blued them. As for extra weight it's a bit more work, but I've tailored that to my liking by drilling out the end of the brakes so they can be repositioned on the barrel and then used one or more 7/16" drill bit stops (or small 7/16" I.D. axle collars that that my local farm supply carries, they are very similar to the bit stops) for extra weight. The front one can also be screwed down to the flat with a short grub screw and a sight pin screwed in on top. Cosmetics can be played with in different ways also so it doesn't look cobbled together.
Check out the Brake for the 1701P. It is secured from the top. Be sure to order the sight pin & set screws.
This, and the post from cobalt327, intrigues me. Does anyone know what this brake is made of? And does the 1701P have a flat on the end of the barrel? And BillK, what do you mean by "the wide side of the -024 type sight post..."? Can you explain what problem I may have with the 1701-024 sight post?
Brake is aluminum, sight post is steel. 1701P barrel has no flat. The sight post isn't round, it's rectangular. This is so the post can be rotated to make the sight picture 'adjustable'. The amount of light appearing on either side of the front post when sighting through the rear sight can be adjusted in other words.
I wound up ordering the parts, 1701-025, 1701-023, and 1701-024 from MountainAir, plus a two-stage trigger assembly with a hammer modified for the hidden breach screw. Total came to just over $121. While I could have gotten the parts from Crosman, MountainAir's prices for the parts did not seem much different from what Crosman charges. Plus, I had already intended to buy the two-stage trigger assembly from MountainAir anyway. Decided to just get it all in one place.
I did this on advice that Roy and MountainAir was a reliable vendor of custom airguns and airgun parts.
I also found a vendor on ebay that is selling an 8-32 half dog 3/16" set screw to replace the 88-089 set screw that secures the front sight/muzzle brake.