Doglock Blunderbuss Musket

I just bought this reproduction Doglock Pistol. This is my first non-modern firearm so If anyone recognizes the maker marks, please let me know. Otherwise, I'm looking for any tips on how

By Fire and Steel - The History of the British Infantry Weapon: Ep 1 - Matchlock and Doglock Muskets

A Rare 8-Bore Dog-Lock Musket

Doglocks, Miquelet and Snaphance

MVTCo Doglock Blunderbuss

Doglock Blunderbuss Musket

MVTCo English Lock Doglock Pistol

Original British Iron Barrel Dog Lock Blunderbuss Circa 1700 – International Military Antiques

Model 1795 Musket, Wheellock, rifled Musket, arquebus, blunderbuss, musket, Flintlock, shotgun, pistol, Shield