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4D has a proven method for shipping tools safely to the client. We use padded envelopes in addition to the mailer when we ship orders to clients. None of the shipping providers are gentle with packages. So, this ensures the tools make the trip all the way to the intended destination. It is super rare…
Why Are There NO Good Gunsmiths Around Here?
Diplock’s Syndrome For those of you who have not read Fred Zeglin’s book on Wildcat Cartridges, here is a little excerpt you might find amusing. “Diplock’s Syndrome,” a syndrome contracted by gunsmiths. The cause is close contact with clients or customers who lack patience, and often what we used to call common courtesy. Custom guns are hand…
After Market Pistol Barrels
In 2018 a new condition became obvious to us here at 4D Reamer Rentals LTD. In the past we saw certain reamers receive damage because of aftermarket cylinders out of Russia or China. They were hardened by the maker to the point that only Carbide tooling could be used on them successfully. We had clients…
Sherman Wildcat Cartridges
4D is proud to announce that we have made an exclusive deal with Tyler Jacobs, Owner of Sherman Wildcat Cartridges. We are now the exclusive source to rent proprietary reamers and headspace gauges for the entire Sherman lineup. While Fred Zeglin was working on the second edition of his Wildcat Cartridges book for Gun Digest…
224 Valkyrie Specifications Published
SAAMI Publishes Approved 224 Valkyrie Cartridge Specifications March 27, 2018 – The Sporting Arms and Ammunition Manufacturers’ Institute (SAAMI) voted to approve the Federal Premium 224 Valkyrie as an official new cartridge during their committee meeting at the 2018 SHOT Show in Las Vegas, Nevada this past January. 224 Valkyrie’s SAAMI standards documents are now…

