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Scope Mount Drill Jig
Scope Mount Drill Jig
Sun Optics USA P/N ST1878
Sun Optics USA Scope Mount Drill Jig of Pro Gun Smith Quality. The scope mount drill jig works on all Springfields, All Enfields, All year Mausers & all Japanesse make rifles. Sun Optics USA Scope Mount Drill Jig Aligns Holes with Bore Using a Precision Ground Arbor Inserted Into the Receiver in Place of the Bolt. No Measuring is Required. The Drill Jig Includes:
1ea. Base Block
1ea. Bore Align Arbor
2ea. v Bushings
1ea. #31 Drill Bushing
1ea. #31 Drill
1ea. 6X48 Tap
2ea. Jig Bars (marked S & M)
2ea. Allen Cap Screws
1ea. Allen Wrench
Sun Optics USA Limited Lifetime Warranty For Material And Workmanship.
Pro Gunsmith Quality
Aligns Holes with Bore Using a Precision Ground Arbor Inserted Into the Receiver in Place of the Bolt
No Measuring Required
Includes #31 Drill Bit and 6X48 Tap
Lifetime Warrany For Material And Workmanship
|Average Customer Rating:
|| based on 10 reviews|
Average Customer Review:
( 10 customer reviews )
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Most Helpful Customer Reviews
Labor saver!Sep 01, 2013
By Jon R. Fory
Well designed and easy to use. Four stars because of the inability to adjust for two mounting holes in the Mauser rear receiver bridge. That said, I'd buy this product again. A great labor-saver!
It gets the job done.Aug 21, 2013
By M J
All in all, I would recommend the product. That being said there are simple adjustments that would have earned a 5 star rating. While a drill bushing is provided, they neglected to include a tap bushing. When you consider the limited accepted deviation tolerance for this type of project a tap bushing is an essential part. Fortunately, I have the machinery and tooling to fabricate my own tap bushing.
The other issue to keep in mind is this tool sets the point of aim utilizing the rifle's receiver, not the barrel. If there is any deviation between the barrel and receiver's point of aim, the end result might be compromised. An easy fix would have extended the center metal alignment tube to extend into the barrel.
Also, make certain that the longer portion of the alignment tube is pointed towards the barrel. There is no marking on the tube so it's a trail an error situation. Again, a simple stamp on the cylinder with an F indicating forward would have resolved the issue.
Lastly, an inexpensive investment in a laser instrument will ensure a perfect mount. Purchase a laser designed to be used in the chamber, set your base and bottom half of the rings, rest your scope on, matching the drill marks and verify the point of aim before you drill.
great productMay 30, 2013
A just recibed the jig, start to drill and belgican fn and this product do a great job.
comes WITH ALL THE TOOLS YOU WOULD NEEED TO TAKE THE JOB DONE.
Well made;fits 93 mauser.May 24, 2013
By Maxwell T. Sandford
Ships with a second plate for other actions. Ships with a drill guide but without a guide for the tap. I made a tap guide on the lathe--a simple turning job. This vendor was out of stock and phoned to tell me there would be a delay and to ask if I wanted to wait for the delivery. Very good communication with the vendor and while you can make a guide, buying this one is easier.
Jig is Great, Drill guides are notJan 24, 2013
By Jacks Dad
I purchased this to drill and tap a Springfield 1903a3 receiver. Lines up the holes great, but the Drill guides are to short and allows the drill bit to flex and break. Bought Wheeler drill guides which are full length and it works perfectly. Just used it on a mauser 98. Worker great on the Front holes, the rear holes a different story (leupold bases) the last hole cannot be drilled using the jig. I used the Base and a carbide drill to drill the last hole.
Overall I like the jig. Has a few problems, but what doesn't.
See all 10 customer reviews on Amazon.com