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Gunsmithing Student Handbook Series
Fred Zeglin released two titles in his new series of instructional books for anyone who wants to understand how guns work. Tailored to students of gunsmithing, whether you are a hobbyist or a professional Zeglin bring over 3 decades of gunsmithing and teaching to the table. These books are clear and concise detailing specific subjects. Lee…
4th Book in the “Gunsmithing Student Handbook Series” is Now in Print!
Being in the gun business for almost 40 years now I have become acutely aware if the lack of basics being taught in schools. In particular in Occupational Trades institutions. Before you send me a nasty gram defending your favorite school keep in mind I teach at one of these colleges and have friends at…
Using Forster “Piloted Roughing Drills”
We often have clients ask about roughing reamers. We have never carried them because that would more than double our inventory costs and would not come close to paying for the expense. In 2025 Forster started offering a new batch of tools, “Piloted Roughing Drills”. They are offered in three (3) pilot size ranges. The…
Ackley Category Added to the Site
We have seen a ton of demand for Ackley calibers since the publication of Fred Zeglin’s two new books in 2017. For this reason we have created a category on the 4D web site to separate out all Ackley cartridges making them easier to find. They still appear in the standard caliber listings as well….
Shipping Methods that Work.
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…
Learn About Pilot Fit, It Matters!
Pilot Diameter is Crucial