Abstract: The invention relates to an upper receiver for a firearm, comprising a supporting part, which supports a barrel bushing for receiving a barrel, a guide for a longitudinally movable breech carrier, and an anchor for a sight. The guide for the breech carrier is formed on the underside of a rail block preferably made of metal which has the anchor for the sight on its upper side, and the supporting part is also preferably made of metal and mounted both to the barrel bushing and to the rail block via removable fasteners.

Abstract: The invention relates to an upper receiver for a firearm, comprising a supporting part, which supports a barrel bushing for receiving a barrel, a guide for a longitudinally movable breech carrier, and an anchor for a sight. The guide for the breech carrier is formed on the underside of a rail block preferably made of metal which has the anchor for the sight on its upper side, and the supporting part is also preferably made of metal and mounted both to the barrel bushing and to the rail block via removable fasteners.

Abstract: The invention relates to a firearm including a component carrier, a barrel having a cartridge chamber for accommodating a cartridge, and a slide that is supported on the component carrier in a longitudinally moveable manner and has a breech block for the barrel and a firing device for the cartridge. The slide bears an extractor for extracting a fired cartridge from the cartridge chamber. An ejector is supported on the slide in a longitudinally moveable manner, which ejector protrudes from the side into the extraction motion path of the cartridge and lies against a stop formed on the component carrier in the end phase of the rearward motion of the slide. The slide, together with the ejector, can be modularly replaced with a second slide having no ejector. For the second slide, said stop assumes the ejector function.

Abstract: The invention relates to a firearm including a component carrier, a barrel having a cartridge chamber for accommodating a cartridge, and a slide that is supported on the component carrier in a longitudinally moveable manner and has a breech block for the barrel and a firing device for the cartridge. The slide bears an extractor for extracting a fired cartridge from the cartridge chamber. An ejector is supported on the slide in a longitudinally moveable manner, which ejector protrudes from the side into the extraction motion path of the cartridge and lies against a stop formed on the component carrier in the end phase of the rearward motion of the slide. The slide, together with the ejector, can be modularly replaced with a second slide having no ejector. For the second slide, said stop assumes the ejector function.

Abstract: This invention provides a method for rapidly obtaining accurate three-dimensional structure of proteins including large or multi-sub unit proteins, using a combination of NMR analysis of backbone only 13C, 15N or 13C and 15N isotopically labeled proteins which are optionally also 2H isotopically labeled in the C? position protons and residual dipolar coupling measurements in more than one partially aligned state and/or orientation data pertaining to overlapping successive peptide pairs.

Abstract: This invention provides a method for rapidly obtaining accurate three-dimensional structure of proteins including large or multi-sub unit proteins, using a combination of NMR analysis of backbone only 13C, 15N or 13C and 15N isotopically labeled proteins which are optionally also 2H isotopically labeled in the C&agr; position protons and residual dipolar coupling measurements in more than one partially aligned state and/or orientation data pertaining to overlapping successive peptide pairs.

Abstract: This invention provides a method for rapidly obtaining accurate three-dimensional structure of proteins including large or multi-sub unit proteins, using a combination of NMR analysis of backbone only 13C, 15N or 13C and 15N isotopically labeled proteins which are optionally also 2H isotopically labeled in the C&agr; position protons and residual dipolar coupling measurements in more than one partially aligned state.